# US 6,298,031 B1 · Disc player

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- Number: US 6,298,031 B1
- Document ID: US6298031B1
- Status: Granted
- Kind: B1
- Application number: 09/262,357
- Filed: 1999-03-04
- Granted: 2001-10-02
- Earliest claimed: 1998-03-19
- Assignees: Pioneer Electronic Corporation
- Inventors: Yuji Morita; Yoshihiro Seshime; Masashi Kurosawa
- Web page: https://patentgrep.com/patent/US6298031B1

## CPC

- G11B 7/08582: {Sled-type positioners}
- G11B 7/08: Disposition or mounting of heads or light sources relatively to record carriers
- G11B 7/0903: {Multi-beam tracking systems}
- G11B 21/24: Head support adjustments
- G11B 7/094: {Methods and circuits for servo offset compensation}
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

A disk player comprises a turntable for rotatably holding an optical disc; an optical pickup for recording information into and reading information from the optical disc, an elongated guide shaft arranged in a predetermined moving direction of the optical pickup for guiding the optical pickup to move in said predetermined direction, a pivotable chassis for mounting the turntable, the optical pickup and the elongated guide shaft, a cartridge holder for receiving and holding a cartridge containing the optical disc. In particular, an adjustment mechanism is provided on the pivotable chassis for adjusting a positional relationship between the optical pickup and the turntable by moving one end of t he elongated guide shaft in a plane which is generally parallel with a recording surface of the optical disc.

## Claims

### Claim 1

A disc player, comprising:
a turntable for rotatably holding an optical disc;
an optical pickup for recording information into and reading information from the optical disc;
an elongated guide shaft arranged in a predetermined moving direction of the optical pickup for guiding the optical pickup to move in said predetermined direction;
a chassis for mounting the turntable, the optical pickup and the elongated guide shaft;
a cartridge holder for receiving and holding a cartridge containing the optical disc;
characterized in that:
an adjustment mechanism is provided on the chassis for adjusting a positional relationship between the optical pickup and the turntable by moving one end of the elongated guide shaft in a plane which is generally parallel with a recording surface of the optical disc,
wherein the adjustment mechanism includes an adjusting plate made of a resin or a metal, said resin or metal adjusting plate including a plastically deformable portion which is plastically deformable during said adjustment effected by the adjustment mechanism,
wherein the adjusting plate includes a front portion and a rear portion, the front portion will be covered up by a cartridge after the cartridge has been inserted into the cartridge holder, while the rear portion is located on the outside of the inserted cartridge.

### Claim 2 (depends on 1)

A disc player according to claim 1, wherein the adjusting plate is pivotably provided on one side of the elongated guide shaft close to the rear of the pivotable chassis.

### Claim 3 (depends on 1)

A disc player according to claim 1, wherein the front portion o f the adjusting plate includes a pivot fulcrum permitting a free pivotal movement of the adjusting plate, and an engaging portion for upwardly clamping one end of the guide shaft in a direction generally perpendicular to the axis of the guide shaft.